/Engine/Source/Runtime/UMG/Public/Blueprint/WidgetLayoutLibrary.h
Gets the slot object on the child widget as a Uniform Grid Slot, allowing you to manipulate layout information.
static [UUniformGridSlot](API\Runtime\UMG\Components\UUniformGridSlot) * SlotAsUniformGridSlot ( [UWidget](API\Runtime\UMG\Components\UWidget) * Widget )